990 lost tick over...almost

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dread
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990 lost tick over...almost

Postby dread » Wed Sep 14, 2016 8:41 pm

I have had problems for a few years with what I thought was the idle stepper motor. Tick over would become high sometimes especially if I rushed starting the bike before the FI light went out. Turning the bike off and back on sorted it every time.
Tonight I started the bike and all was well, fast idle to warm up and then correct rpm tick over. I stopped the bike and when I restarted the idle was non exsistant. I had to use the throttle to start it and to keep it running. Turning the bike off and on has made no difference. It now feels a little fluffy at low revs but pulls strongly as normal when opened up. When fully warm it will just tick over if nursed to rest but otherwise stalls.

Could it be that the stepper motor has finally given up, or is it down to something more simple like bad connections ?
Any ideas before I start spending please ?

J 13USH
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Re: 990 lost tick over...almost

Postby J 13USH » Wed Sep 14, 2016 9:45 pm

Do you have a power commander fitted? If you do, try unplugging it and putting the standard connector back together. What have you had done to it? Has it been remapped?

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dread
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Re: 990 lost tick over...almost

Postby dread » Thu Sep 15, 2016 8:52 am

2005 bike
Been standard up till this year.
Then added ITG filter, HP corse pipes and remapped with tune ecu.
Always has acted up occasionally with tick over but always reset ok when turned off and on again.

Always thought stepper was the reason.

J 13USH
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Re: 990 lost tick over...almost

Postby J 13USH » Thu Sep 15, 2016 11:21 am

I don't think the stepper is a common problem. I think it's worth getting a custom map. I took mine to BSD a couple of weeks ago. He knows what he's talking about with these bikes. He says he's remapped over 400 ktm 990s. It costs £330 but I think it's worth it for piece of mind.

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No. 47
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Re: 990 lost tick over...almost

Postby No. 47 » Thu Sep 15, 2016 11:47 am

Could be just simple adjustment of TPS required - hook it up to TuneECU.
'08 ex-Battle race KTM Superduke 990 R No.47
'08 OE KTM Superduke 990 R
'01 Ducati 996S

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dread
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Re: 990 lost tick over...almost

Postby dread » Fri Sep 16, 2016 9:43 am

Cheers for the advice, I did that and the bike reset OK, but then during the ride the tickover was unstable and tended to be high 2-3000 rpm. Bike was jerky under 4000rpm especially on a fixed throttle but fine above. I could reset by toggling ignition but the tickover was soon high again.

This seems to point to the stepper in most cases I have read about. Looks like a stepper from a Triumph 1050 will fit.

Think this is the next step.

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Re: 990 lost tick over...almost

Postby SDXLIXI » Fri Sep 16, 2016 2:40 pm

Set you throttle cable to allow a lot of slack. Plug in your tune ecu. Do the throttle cable/idle adjustment. This will step the flys all the way shut, ignition back off, then set throttle cable slack. Start up don't touch throttle and do 15 min reset, be sure to time accurately, switch off after 15 mins but before 16. See what next start is like after that. Mine used to start ok but if I touched the throttle before warm it wouldn't idle. Then this changed to high idle. Did the above and all sorted.
990 SD 2010 Orange, MIvv Souno cans, touring screen, GB racing covers and frame sliders, KTM spindle sliders.

1997 Yam TRX850

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dread
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Re: 990 lost tick over...almost

Postby dread » Sun Sep 18, 2016 9:25 pm

Cheers I will try that tomorrow.

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dread
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Re: 990 lost tick over...almost

Postby dread » Mon Sep 19, 2016 3:04 pm

I haven't had time for full test but; Adjusting cables, 15min reset and then TPS set. Seems to have done it. Tick over rose slightly after about 10 mins riding but has settled down to 1450 rpm again and now seems solid.

Hope I am not speaking too soon, so far so good.

Cheers for the great advice guys.

Forum and members still on point :D

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Re: 990 lost tick over...almost

Postby SDXLIXI » Mon Sep 19, 2016 8:26 pm

Glad it worked out well dread. Hopefully it's the end of your troubles.
990 SD 2010 Orange, MIvv Souno cans, touring screen, GB racing covers and frame sliders, KTM spindle sliders.

1997 Yam TRX850

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dread
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Re: 990 lost tick over...almost

Postby dread » Thu Sep 22, 2016 8:03 pm

Had time for a proper test tonight and all is not well.

At first it was good then couple of miles in to the ride it started to have a high tick over 2000rpm ish which would drop to 1400 if I pulled the clutch in.

Then I could reset by toggling the ignition Just as it had been for past couple of years. But the reset effect was lost very quickly. It stayed like this till I reached my destination Approx 30 miles. Not too bad to ride very smooth but ticking over too high 2-3000 rpm.

Started ok for the ride home but tick over was unsettled by 500 rpm or so, higher and lower.
Then around half way home it lost tickover altogether and low rpm become fluffy, fine at higher rpm and WOT.
Got home and bike just held a tickover of 1000rpm if helped not to stall on decel.

So back where I started.

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dread
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Re: 990 lost tick over...almost

Postby dread » Fri Oct 27, 2017 8:05 pm

Well its been a while but I have now had a map done at BSD and got the bike running ok
BUT still got intermittent high idle that resets with a toggle of the ignition.
This happens more in warmer weather, on a cool day it may not happen at all in 200 miles but as soon as the temp goes above 13 degrees ambient it starts to happen more often.
This has got me thinking it may be an engine temperature sender or ambient temp sender problem.

I have replaced the stepper motor and set tps up as per book.


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